Has your AT&T mobile service improved in the past year? The company sure hopes so. It spent about $25 million in Denver to upgrades its networks and improve coverage, reliability and speed, the company said Thursday.

Officially, AT&T shared that it invested $300 million in its Denver wireless networks between 2013 to 2015. A year ago, in a similar update, AT&T invested $325 million between 2012 to 2014. If my math is correct, that means 2015 saw $25 million in improvements.